Concrete-paver bucket mechanism



Match 10. 1925.

E. H LICHTENBERG CONCRETE PAVER BUCKET MECHANISM Fil ed March l, 1923 s'sheets-sneet 1 Snowmen EH1 z'dd'izberq' m M IE March 10 1925. 1,529,442- E. H. LICHTENBERGY CONCRETE PAVER BUCKET. ME'CHANISM FiledMarch 1, 1923 5 Sheets-Sheet 2 HWI newton 3 Sheets-Sheet 5 E. H. LJCHTENBERG. CONCRETE PAVER BUCKET MECHANISM Filed March 1, 1923 March 10. 1925.

Patented Mar. 10,1925.-

UNITED STATES PATENT: orcE- ERICH n. LICHTENBEBG, or MILWAUKEE, WISCONSIN, AssIG oR 'ro KOElHRING oom- PM, or MILWAUKEE, WISCONSIN, A CORPORATION.

CONCRETE-PAVER BUCKET MEGIEANISM.

Application filed March -1, 1923. Serial No. 622,026.

To all whom it may concern:

Be itknown' that I, Enron H. LIOHTEN- BERG, a citizen of the United States, residing at Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in G011- crete-Paver Bucket Mechanisms, 'of which the following is a specification.

In my Letters Patent No. 1,141, 17 0 issued June 1, 1915 and No. 1,411,217 issued March 28, 1922 are described certain types of paving machines involving'boom and bucket distributing mechanism for concrete. It is the object of this invention to provide an improved construction .of ibucket mechanism of the types disclosed in said Letters Patent, the features of improvement residing primarily in the means for supporting the bucket upon. the boom, the trolley or carriage assemblage of parts, and the operating means intermediate the trip-mechanism on the carriage or trolley and the door or doors of the bucket.

It is desirable'that the bucket with its contents be supported from the boom in stable equilibrium, of course, to which end I have designed the trolley from whichthe bucket is hung in a peculiar and advantageous manner. Among other things I utilize supporting rollers or wheels on the carriage, peculiarly mounted as regards their connection with said carriage or trolley, so as to have a special movement relative to thecarriage or trolley in the nature of an equalizing action 35 or adjustment. This self equalizing feature, so to speak, as regards the trolley wheels or rollers has a tendency to stabilize the bucket in its travel, and in respect to its center of gravity when loaded, all in a manner which would appear more fully after an under" standing is had of the detail construction of my improvements. if

The feature of the invention which involves the'mounting of certain trip mechanism for dumping the bucket, upon a center body member, to which the trolley wheel brackets and the bucket hangers may be bolted, is also especially desirable in that it facilities the putting together or assembling of the various parts of the trolley or carriage, and the application of the same to the a boom, as well as the removal from the boom when such removal becomes necessary. I

The special opening and closing connections for the door or doors of the bucket,

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intermediate the door or. doors'and the trip mechanlsmon the trolley, are such as to give a very positlve action to the door in opention, and furthermore the connections are mg and 'in, its restoration to closed condiso arranged in relation to the door-as to obtain a maximum amount of leverage in maintaining the door closed and in drawing it to closed position, as the case may be. I furthermore use a special formation of rollers for the trolley engaging the boom so that the pressure load of the bucket .and its contents is applied to the 'boom channels or tracks as closely as possible to the heels of said channels.

In the accompanying drawings,

Figure 1 is,a side elevation of a boom and bucketmecha'nism, embodying the invention, dotted lines showing the bucket door swung to an open position.

Figure 2 is a front elevation of the same, or a view which looks toward the bucket from its left hand side as viewed inFig. 1.

Figure 3 is a topplan view of the body I of the trolley. 1

Figure 4c is a side elevation of said body,

- and Figure 5 is a detail rear View of the trolley body.

In the drawings, A denotes .a boom comprised of a pair of channels suitably fabri catecl together to provide a unitary boom body or support. The bucket is designated B, and the body of the trolley is designated 1 (see Fig. 2). The bucket B, generally speakin is of the type illustrated in my Letters atent No. 1,411,417, previously re ferredlo, in that it is of a spreading type as known in the art, being equipped at its bottom with a door 2 adapted to swing downwardly a predetermined distance to render operative to a greater or less extent the bottom opening of the bucket and deliver the contents of the bucket to the subgrade in a layer of a predetermined thickness. The means for operating the door are comparatively simple, including links 3 at opposite sides of the bucketB, which links are pivotally connected at their lower ends to the door 2 near the free edge'of the latter. At their upper ends the links are pivotally connected at 4 with arms 5, carried by a rock shaft 6. The rock shaft 63 is mounted in suitable bearingbrackets 7, secured'te the upper portion of the bueketB,

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and at its center portion therock shaft has a rocker arm 8. The center arm 8-is attached in a suitable manner as by a connection generally designatedC to a trip link 9, the upper end of which is pivotally connected to a pair of trip arms 10 plvotally mounted on the trolley by a trip shaft 11. This shaft 11 may be equipped with a clos ing arm 12, (seen best in Fig. 2) adapted to be tripped closed by means of a cam or some obstruction device in its path of movement, as the bucket B is brought back to ashown best in Figures 3- to 5 inclusive.

This body 1 has the laterally extending arms 13 'to which are bolted the hangers 1+1 which connect the bucket B rigidly with the trolley or carriage 1. Likewise there are bolted to opposite sides of said body 1, and

to its lateral arms 13 the side brackets 15,-

which form the sides of the trolley proper. The sides or brackets 15 are equipped with rearwardly extending curved horns or arms 16, each of whichhas a roller or trolley wheel 17 engaging in the channel of an adj acent channel member of the boom A. Intermediate their ends, the sides 16 of the trolley are equipped with the pivoted equalizing arms 18- at the opposite endsof each of which are provided rollers 19 that correspond in general formation with the rollers 17 previously mentioned. The equalizing arms 18 are really carried by vertical extensions of the sides or side brackets 15 of the trolley. The purpose of these equalizing parts 18 is to provide for an auto- I matic adjustment of the rollers 19 to equilize the pressure load transmitted to the boom therethrough. Obviously when the bucket B is filled there is a slight variation in its center of gravity due to the slight variation in the piling up of the concrete or material fed into the bucket B to be distributed. Notwithstanding such slight variation the pressure load is distributed equally on the portions ofthe boom A engaged by the rollers 17 and 19, incident to the action of the arms 18 aforesaid.

The rollers 17 and 19 are carried by the trolleyat a slight upward angle "and are formed with rounded faces so as to fit as far as possible into thechannels of the channel members of the boom A and, therefore, bringthe pressure load as close as possible to the heels of the channels, which channels e. reaaeee section in Figure 2, and clamped to a shutt-le 21 supported in guides 22 of the body 1 of the trolley. On this shuttle is carried 'the trip member 23 adapted under controlled adjustment to engage the upper end of the link 9 and shift the same over the dead center line of the shaft 11 to cause the link and its supported parts to dropas shown by dotted lines in Figure 1. The shuttle 21 with its cable clamping means, trip member 23, and other detail parts such as the shaft 11, link 9 and arms 10, are adapted tobe assembled in and on the body 1 of the trolley and handled with said body as a unit. The parts 15 and 14 are then adapted to be bolted to the body. The foregoing makes an excellent structure, for practical manufacturing purposes.

It is notable furthermore that the connection' generally designated C may comprise a housing for a spring which estabvllshesa ylelding connection intermediate the link 9 and the arm-S, substantially as disclosed in my Patent 1,411,217 desirable where a door such as the door 2 may not close with precise tightness owing to an obstruction between it and the bucket.

The links 3 are guided somewhat by brackets 24 off-standing from the sides of the bucket B and these brackets additionally form stops capable of coacting with stop members 25 on the links 3,which stop members 25 determine the extent of opening of the door 2, by engagement with thebrackets 24. A series of openings 26 in the links 3 and suitable pins to pass through said openings and the-stops 25 enable the adjustment of the stops 25 for the purpose of varying the degree of opening movement of said door2,'and therebyiegulate the thickness of the stream or layer of concrete or plastic material fed from the bucket in its distributing action. Asingle loor 2, is illustrated in the drawings but obviously companion' doors might be utilized within the purview of the invention with equal advantage as regards the efiiciency of the bucket distribution method. a

Figure 1 shows that the boom A is supported upon a horizontal axis 27 compris ing a bracket which in turn is pivoted on a vertical axis 28, the latter carried by. an offstanding arm 29 ordinarily mounted so as to project from the frame of a concrete paving machine iwhich comprises a mixer. The

formation of the trolley or carriage which i supports the bucket as described herein is advantageous, owing to the provision of the extensions, horns or arms 16, In the pres' ent construction the carriage or trolley may be said to be cantedso that its innermost portion may over-hang the point of pivotal support of the boom and'enable the bucket to be brought well under said pivotal support in toward the mixer discharge chute to receive the plastic or other material from the latter.

The shuttle, cable clamp, and itsmount ing on the trolley;'-also the trip member carried by the shuttle are features of construe-- copending applie.

filed January 27,

. means for the bucket to enable it to travel on the boom including a trolley, said trolley comprising sides,

on the boom including a trolley, said trolley to said sides in the-longitudinal plane of the beam, and rollers on said arms engaging the boom to travel thereon.

2. In combination, a boom, a distributing bucket to traverse the same and supporting means for the bucket/to enable it to travel comprising sides, equalizing arms pivoted to said sides, and rollers on said armsengaging the boom to travel thereon, hangers connecting the trolley with the bucket near one to the sides of the end of the latter, and said trolley comprising extensions projecting toward the end of the bucket remote' from that connected with the hangers, and rollers 'on said extensions engaging the boom. Y

3. In combination, a boom, a trolley thereon comprising sides having rearward extensions, rollers mounted on said extensions and engaging the boom, equalizing arms pivoted trolley intermediate the ends of the latter, rollers-on the ends of said arms and engaging the boom, a bucket and hangers connecting the bucket and said trolley.

4. Means as claimed in claim 3, wherein the hangers extend from the trolley from points substantially in the plane of said equalizing arms.

5. In combination, a boom, distributing bucket mechanism' bucket, a trolley supporting the the boom, said trolley having a longitudinal guideway at its upper portion, bucket door tripping mechanism. assembled in the body beneath said guideway to provide a trolley body and tripping mechanism unit, and roller devices secured to the body above said guideway and intermediate the boom and the trolley.

ticket on comprising a body equalizing arms pivoted thereon comprising a 6. In combination, a boom, distributing bucket mechanism thereon comprising a bucket, a trolley supporting the bucket. on

the boom, said trolley comprising a body,

bucket door tripping mechanism assembled in the body to provide a trolley body and tripping mechanism unit, side members dotachably applied to the body of the trolley and provided with longitudinally extended roller carrying arms, and roller devices intermediate the body of said side members and the boom.

7. In combination, a boom, distributing bucket mechanism thereon comprising a bucket, a trolley supporting the bucket on the boom, said trolley comprising a body, bucket door tripping mechanism assembled in the body to provide a trolley body and tripping mechanism unit, side members applied detachably to oppositesides of the trolley body, equalizing arms pivoted on said side members and a pair of rollers car the boom.

8. In combination, a boom, distributing bucket mechanism thereon comprising a bucket, a trolley supportingthe bucket ,on

the boom, said trolley comprising a body, a bucket door tripping mechanism assembled in the body to provide a trolley body and tripping mechanism unit, detachable side members applied to the trolley body and formed with rearward extensions, rollers carried by said extensions and engaging the boom, equalizing arms pivoted between their 'ends to said-side members, and rollers ,on the ends of said equalizing arms and en gaging the boom.

9. In combination, a boom, distributing bucket mechanism thereon comprising a ried by each equalizing arm and engaging bucket, a trolley supporting the bucket on the boom, said trolley comprising a body, bucket doortripping mechanism assembled in the body to provide a trolley body and tripping mechanism unit, side members attached to said body and having a longitudi nally extended arm, rollers supporting the arm and side members on the boom, and hangers connected with the trolley body and the bucket to support the latter on the trolley. a

10. A distributing bucket device substantially as-describe'd comprising a bucket, a door for said bucket,-link members connected 'to the door and arranged at opposite sides of the bucket,a' shaft mounted on the upper portion of the bucket, arms connecting the link members and the shaft, a trolley to support the bucket, and tripping mechanism-on the trolley connected withlsaid shaft for rocking the latter to open the cor.

tially'as described comprising a bucket, a door for said bucked-link members 'connect-' 11. A distributing bucket device substa'n- I i ed to the door and ed to the door and arranged at opposite sides of the bucket, a shaft mounted on the up per portion ofthe bucket, arms connecting the link members. and the shaft, a trolleyto support the bucket, tripping mechanism on the trolley connected with said shaft for rocking'the latter to open the door, and stop means cooperating with the link members to limit the extent of movement thereof and thereby regulate the degree of opening movement of the door.

12. A distributing bucket device substantially as described, comprising a bucket, a door for said bucket, link members connectarranged at opposite sides of the bucket, a shaft mounted on the upper portion of the bucket, arms connecting the link members and the shaft, a trolley to support the bucket, tripping mechanism on the trolley connected With said shaft for rocking the latter to open the door, stop means cooperating with the link members to limit the extent of movement/thereof and thereby regulate the degree of opening movement of the door, together with .pins

and openings intermediate the link members and the stop members for the adjustment of the latter as described.

13, In. combination, a boom comprising opposite channels forming tracks, distributing bucket mechanism including a bucket, a trolley supporting said bucket, and rollers intermediate the trolley and the boom and formed with convex treads formed to engage the heel portions of the boom to bring the pressure load of the bucket and its contents to the opposite llOvlS. of the boom channels in the traverse of the rollers along the latter.

In testimony whereof I ai'fix my signature. 1

ERICH H, LICHTENBERG. 

